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Finding the Fourth Proportional to 12,628.58, 18,936.14 and 3,861.14

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Solution

The fourth proportional to 12,628.58, 18,936.14 and 3,861.14 is: 5,789.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.58 : 18,936.14 = 3,861.14 : x
  2. Step 2: Convert to fraction form
    12,628.58/18,936.14 = 3,861.14/x
  3. Step 3: Cross multiply
    12,628.58x = 18,936.14 × 3,861.14
  4. Step 4: Simplify right side
    12,628.58x = 73,114,973.61
  5. Step 5: Solve for x
    x = 73,114,973.61/12,628.58
  6. Step 6: Final answer
    x = 5,789.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.